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quester [9]
4 years ago
5

Tammy completed the following steps to simplify the expression

Mathematics
1 answer:
Brrunno [24]4 years ago
3 0

Answer:

the third term wasn't distributed properly the -2 has to multiply by +2 = -4

Step-by-step explanation:

-5x^2y - 3xy^2 - 2(4y+2) - 2.5x^2y

-5x^2y - 3xy^2 - 8y - 4 - 2.5x^2y

-7.5x^2y - 3xy^2 - 8y - 4

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A rectangular dining room table top is 36 inches wide the diagonal to tabletop measures 85 inches how many inches long is a tabl
makvit [3.9K]
Pythagorean theorem: a^2 + b^2 = c^2
36^2 + b^2 = 85^2
1296 + b^2 = 7225
b^2 = 7225 - 1296
b^2 = 5926
b = square root of 5929
b = 77 inches long
6 0
3 years ago
× to the second power minus 25​
Zarrin [17]

Answer:

x=5

Step-by-step explanation:

(x^2)-25=0

(x^2)=25

√(x^2)=√25

x=√25

x=5

4 0
3 years ago
Read 2 more answers
Which point is an x-intercept of the quadratic function
daser333 [38]
The x-intercept of f(x) = (x + 6)(x - 3)
f(x) = 0 → (x + 6)(x - 3) = 0 → x + 6 =0 or x - 3 =0
x = -6 or x = 3
Therefore the x-intercepts are: (-6; 0) and (3; 0)
Your answer is (-6; 0)

8 0
4 years ago
Read 2 more answers
The temperature is dropping 4° each hour how many degrees will temperature dropped in seven hours
a_sh-v [17]
The temperature would have dropped 28 degrees

4 0
3 years ago
After 3 days a sample of radon-222 has decayed to 58% of its original amount.(
iren2701 [21]
Half-life = [elapsed time * log (2)] / [log (begng amt / endg amt)]
half-life =  (3 days * 0.30102999566) / log (1 / .58)
<span>half-life =  0.903089987 / log </span> (<span> <span> <span> 1.724137931)
</span></span></span>half-life =  <span>0.903089987 / 0.23657200643</span>
half-life =  <span> <span> <span> 3.8174 days

Source:
http://www.1728.org/halflife.htm

</span></span></span>
3 0
3 years ago
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